Nice idea, we actually had planned a skill similar to this for shields. One that helps protect a character on an adjacent tile. With this you could increase the defense of the other guy instead of your own defense like you do it with shieldwall. However, it turned out that this mechanic is so extremely situational that you will use it only very rarely. So we put it back on the idea-shelf for later. We want all skills in the game to be really useful and meaningful and this one just did not fit in. We still have it in the back of our heads, though ;)
